<template>
	<div class="todo-container">
		<div class="todo-wrap">
			<!-- 头部 -->
			<Header :addTodo="addTodo"/>
			<!-- 中间区域 -->
			<List :todos="todos" :deleteTodo="deleteTodo" :checkTodo="checkTodo"/>
			<!-- 底部区域 -->
			<Footer 
				:todos="todos" 
				:clearDoneTodo="clearDoneTodo" 
				v-show="todos.length"
				:checkAll="checkAll"
			/>
		</div>
	</div>
</template>

<script>
	import Header from './components/Header'
	import List from './components/List'
	import Footer from './components/Footer'

	export default {
		name: "App",
		components:{Header,List,Footer},
		data() {
			return {
				//所有要做的事
				todos:[
					{id:'928daswe2y187e',title:'吃饭',done:false},
					{id:'928daswe3x2344',title:'睡觉',done:true},
					{id:'928daswe4x8792',title:'学习',done:false}
				]
			}
		},
		methods:{
			// 用于添加一个todo
			addTodo(todoObj){
				this.todos.unshift(todoObj)
			},
			// 用于删除一个todo
			deleteTodo(id){
				//从todos数组中，过滤出来想要的数据，并更新一下todos数组
				this.todos = this.todos.filter(t => t.id !== id)
			},
			// 用于勾选一个todo
			checkTodo(id){
				//找到要勾选的那一项
				let result = this.todos.find((t)=>{
					return t.id === id
				})
				//将要勾选的那一项，done值取反并赋回去
				result.done = !result.done
			},
			// 用于清除已完成的
			clearDoneTodo(){
				this.todos = this.todos.filter(t => !t.done )
			},
			// 用于全选
			checkAll(done){
				this.todos.forEach(t => t.done = done)
			}
		}
	};
</script>

<style>
	/*base*/
	body {
		background: #fff;
	}
	.btn {
		display: inline-block;
		padding: 4px 12px;
		margin-bottom: 0;
		font-size: 14px;
		line-height: 20px;
		text-align: center;
		vertical-align: middle;
		cursor: pointer;
		box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
			0 1px 2px rgba(0, 0, 0, 0.05);
		border-radius: 4px;
	}
	.btn-danger {
		color: #fff;
		background-color: #da4f49;
		border: 1px solid #bd362f;
	}
	.btn-danger:hover {
		color: #fff;
		background-color: #bd362f;
	}
	.btn:focus {
		outline: none;
	}
	.todo-container {
		width: 600px;
		margin: 0 auto;
	}
	.todo-container .todo-wrap {
		padding: 10px;
		border: 1px solid #ddd;
		border-radius: 5px;
	}
</style>